Wisconsin Department of Transportation

Alert: The following services will be unavailable on Saturday, January 5, 2013 from 12 a.m. (midnight) to 6 a.m. CST due to system maintenance.

US 51, Stoughton Rd. Corridor Study - Need/purpose

Safety | Congestion | Bicycle/pedestrian | Transit

Stoughton Road (US 51) and Pflaum Road intersection.

The Needs Assessment (NA) and Traffic, Safety and Needs Identification Analysis (TSNIA) were an extensive research effort based upon public input, future land use analysis and projected traffic volumes.

Three primary reasons to investigate improvement options on the US 51 Stoughton Rd. corridor have been identified.

Some of the following document(s) are in Adobe PDF PDF format.
(Note: Some files are large and may take longer to download depending on individual connection speeds. Users may need to zoom in to see details.)


Improving safety along the corridor is the primary concern of the study. At most intersections crash problems exist today or are expected to emerge as traffic volumes increase if no changes are made to the current roadway.

  • Along the corridor 2005-2008, based on info. gathered for the TSNIA, there were:
    • 1,158 crashes (over five/week)
    • 441 injury crashes (over two/week)
    • Eight fatalities
  • Segment crashes rates were higher than the statewide average
  • Under existing conditions crashes are expected to increase as traffic volumes increase
  • Nearly 75 percent of the crashes along the corridor are intersection related. View crash chart data below for each segment:


Once on the fringe of Madison, Stoughton Rd. is now surrounded by commercial and residential areas, with more employment and residential growth planned for the area in years ahead.

  • Madison Area Metropolitan Planning Organization (MPO) projects employment in the corridor to increase by 117 percent and population to increase by 92 percent between 2000 and 2030.
    • Existing congestion is causing Stoughton Rd. traffic to be increasingly diverted to local roads in adjacent neighborhood communities.
    • Increase in traffic volumes will deteriorate level of service (LOS) for motorists at several signalized intersections along the corridor.
      • Level of Service (LOS) - A quantitative measure of the overall traffic flow at an intersection. Those measurements range from LOS A (traffic is flowing good) to LOS F (traffic is extremely restricted and many times experiencing gridlock). LOS D/E is considered the lowest acceptable rating for an intersection.
      • The chart below illustrates the anticipated congestion levels in the p.m. peak-hour today and in 2030 under the various alternative scenarios as developed from the TSNIA. View Alternatives A, B and C.
      • Capacity expansion was not investigated as part of the TSNIA but is to be examined in this EIS. The LOS table above will be updated once the capacity expansion info. is obtained.
  • Travel times along the corridor will continue to increase as time passes. Travel times for the whole corridor, or individual segments, can be viewed for northbound and southbound trips:
    • Northbound
    • Northbound segments
    • Southbound
    • Southbound segments
    • Note - The info. above was developed as part of the TSNIA. Capacity expansion was not investigated as part of the TSNIA but is to be examined in this EIS. The Travel times tables above will be updated once the capacity expansion info. is obtained.

Bicycle/pedestrian facilities

  • Significant gaps were found in bicycle and pedestrian facilities in the corridor.
  • Bicycle and pedestrian facilities may be constructed in several locations as stand alone projects or in cooperation with responsible municipality.
  • Potential bicycle/pedestrian overpasses at Tompkins Dr., Helgeson Dr., Walsh Rd./Parkwood Dr. (over WIS 30), Larson Court, East Washington Ave., and Anderson Rd. (over I-39/90/94) will greatly enhance safety for crossings in the corridor.


Daily bus ridership is estimated at 53,000 passengers on 39 local bus routes and four express bus services.

The study team met with Madison Metro, city of Madison Planning, and the Metropolitan Planning Organization to determine additional supplements to that system. It has been determined that adding more park and ride lots and expanding existing lots would enhance corridor operations. Further study will be completed as details of the alternatives are finalized.

Questions about the content of this page:
US 51 Stoughton Road Study Team, us51stoughtonrdstudy@dot.wi.gov SSI - Contacts
Last modified: June 25, 2013

All external hyperlinks are provided for your information and for the benefit of the general public. The Wisconsin Department of Transportation does not testify to, sponsor or endorse the accuracy of the information provided on externally linked pages. Some pages contain links to other documents and media types (PDF, Word, Flash, Video, etc.) and require free plugins to work. Visit our software information page for assistance.